Nettalk 6.7.16 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
The common filenames for the program's installer are nettalkg.exe, natgui.exe, NetTalk.exe, PCC NetTalk.exe or Uninst_NetTalk.exe etc. The following versions: 6.7, 6.6 and 6.5 are the most frequently downloaded ones by the program users.
The latest version of Nettalk can be installed on PCs running Windows XP/Vista/7/8/10/11, both 32 and 64-bit. The software is included in Communication Tools. We recommend checking the downloaded files with any free antivirus. This free tool was originally created by Nicolas Kruse.
From the developer:
Nettalk is a powerful but easy to use free (open source) IRC-client for Windows. The smart user interface is based on Windows standards, so it is easy to get used to it. The following languages for the interface are available: English, Spanish, Dutch, Russian, Chinese, Hungarian and German.
You may want to check out more software, such as AQQ, IMVU 3D messenger or KVIrc, which might be similar to Nettalk.